The second Chinese glacier inventory: data, methods and results
The second Chinese glacier inventory: data, methods and results
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DOI：
10.3189/2015jog14j209
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发表时间：
2015-01-01
影响因子：
3.4
通讯作者：
Jiang, Zongli
中科院分区：
文献类型：
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作者：
Guo, Wanqin;Liu, Shiyin;Jiang, Zongli
第二次中国冰川清单是基于2006- 2010年期间获得的218个Landsat TM/ETM+场景编制的。在冰川轮廓的勾画中，首先采用了广泛使用的波段比分割方法，然后进行了大量的人工改进。航天飞机雷达地形使命数字高程模型被用来推导冰川的海拔属性。利用实时动态差分全球定位系统测量的或从高分辨率图像数字化的一些冰川的边界作为参考，以验证用于划定冰川的方法的准确性，这导致人工改进的净冰轮廓的定位误差为+/- 10米，人工数字化的碎片覆盖部分轮廓的定位误差为+/- 30米。使用这两种定位精度评估的汇编清单的冰川面积误差为+/-3.2%。新清单的汇编部分总面积为43 087 km（2），其中1723个冰川被碎片覆盖，碎片覆盖总面积为1 494 km（2）。中国第一次冰川数字化编目中未编制的冰川面积约为8753 km（2），主要分布在青藏高原东南部，2006- 2010年期间没有发现质量合格的冰川轮廓图。
The second Chinese glacier inventory was compiled based on 218 Landsat TM/ETM+ scenes acquired mainly during 2006-10. The widely used band ratio segmentation method was applied as the first step in delineating glacier outlines, and then intensive manual improvements were performed. The Shuttle Radar Topography Mission digital elevation model was used to derive altitudinal attributes of glaciers. The boundaries of some glaciers measured by real-time kinematic differential GPS or digitized from high-resolution images were used as references to validate the accuracy of the methods used to delineate glaciers, which resulted in positioning errors of +/- 10 m for manually improved clean-ice outlines and +/- 30 m for manually digitized outlines of debris-covered parts. The glacier area error of the compiled inventory, evaluated using these two positioning accuracies, was +/- 3.2%. The compiled parts of the new inventory have a total area of 43 087 km(2), in which 1723 glaciers were covered by debris, with a total debris-covered area of 1494 km(2). The area of uncompiled glaciers from the digitized first Chinese glacier inventory is similar to 8753 km(2), mainly distributed in the southeastern Tibetan Plateau, where no images of acceptable quality for glacier outline delineation can be found during 2006-10.